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Role of Glycoprotein 2B/3A Inhibitors in STEMI with Large Clot Burden and Deferred Stenting
M A H Khandaker1, P Panduranga
1Dr Md Azizul Hasan Khandaker, Acting Senior Specialist, Department of Cardiology, National Heart Center, Royal Hospital, Muscat, Sultanate of Oman;
Insights
This case study highlights managing heavy thrombus burden in ST-elevation myocardial infarction (STEMI). Deferring stenting and using Glycoprotein IIb/IIIa inhibitors with heparin can prevent complications and reduce infarct size.
Area of Science:
- Cardiology
- Interventional Cardiology
- Acute Coronary Syndromes
Background:
- ST-elevation myocardial infarction (STEMI) often involves significant thrombus burden.
- Current guidelines do not routinely recommend thrombus aspiration or deferred stenting in STEMI.
Purpose of the Study:
- To present a case of successful management of a STEMI with heavy thrombus burden.
- To discuss the potential benefits of deferred stenting in selected STEMI patients.
Main Methods:
- A 62-year-old male with acute inferior wall STEMI and a totally occluded right coronary artery.
- Unsuccessful mechanical thrombus aspiration, followed by limited aspiration with a Guideliner catheter.
- Treatment with Tirofiban (Glycoprotein IIb/IIIa inhibitor) and low molecular weight heparin.
- Deferred stenting after initial medical management.
Main Results:
- Initial thrombus aspiration yielded minimal improvement in coronary blood flow (TIMI-I).
- Medical therapy with Tirofiban and heparin reduced thrombus burden and improved flow (TIMI-II).
- Successful stent deployment was achieved with restored good flow, avoiding no-flow/slow-flow phenomena.
Conclusions:
- In cases of heavy thrombus burden and failed aspiration, deferring stenting may be a viable strategy.
- Glycoprotein IIb/IIIa inhibitors and heparin can facilitate thrombus resolution and improve outcomes.
- Selective use of deferred stenting may reduce infarct size and subsequent cardiac events in STEMI.
Abstract:
A 62 years old male presented with acute inferior wall ST-elevation myocardial infarction. His coronary angiogram showed totally occluded right coronary artery with large thrombus burden with TIMI-0 flow. Multiple attempts were made to aspirate the clot using mechanical thrombus aspiration catheter, but no thrombus could be aspirated. Guideliner catheter was used to aspirate some thrombus, resulting in final TIMI-I flow. He was treated with 48 hours of Tirofiban Glycoprotein 2b3a inhibitor infusion along with low molecular weight heparin. Re-look coronary angiogram showed TIMI-II flow with less thrombus burden. Eventually, stent was deployed and good flow was achieved without any no flow/ slow flow. As per revascularization guidelines, routine thrombus aspiration and deferral of stenting in patients with STEMI is not recommended. However, this case indicates that if thrombus burden is heavy, aspiration is unsuccessful; it is advised to defer stenting and treat with Glycoprotein 2b3a inhibitors and low molecular weight heparins to prevent complications of no flow or slow flow phenomena. If patient is properly selected, deferred stenting can reduce final infarct size and potential cardiac events.
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